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2243561 = 4154721
BaseRepresentation
bin1000100011101111101001
311012222120212
420203233221
51033243221
6120030505
725032665
oct10435751
94188525
102243561
1112a2691
12902435
13607268
144258a5
152e4b5b
hex223be9

2243561 has 4 divisors (see below), whose sum is σ = 2298324. Its totient is φ = 2188800.

The previous prime is 2243551. The next prime is 2243587. The reversal of 2243561 is 1653422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1653422 = 2826711.

It can be written as a sum of positive squares in 2 ways, for example, as 755161 + 1488400 = 869^2 + 1220^2 .

It is a cyclic number.

It is not a de Polignac number, because 2243561 - 26 = 2243497 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 211 + 213 + 42 + 35 + 59 + 67 + 1 .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2243531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27320 + ... + 27401.

It is an arithmetic number, because the mean of its divisors is an integer number (574581).

22243561 is an apocalyptic number.

It is an amenable number.

2243561 is a deficient number, since it is larger than the sum of its proper divisors (54763).

2243561 is an equidigital number, since it uses as much as digits as its factorization.

2243561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54762.

The product of its digits is 1440, while the sum is 23.

The square root of 2243561 is about 1497.8521288832. The cubic root of 2243561 is about 130.9119506220.

Adding to 2243561 its reverse (1653422), we get a palindrome (3896983).

The spelling of 2243561 in words is "two million, two hundred forty-three thousand, five hundred sixty-one".

Divisors: 1 41 54721 2243561